This was a Christmas gift from my wifey...best. gift. ever. So far I haven't done much down and dirty dirt riding, but rolling on some Conti 4 Season 28's, this bike has become my go to commuter & training companion. It is soooo smooooth, the carbon fork and frame just suck the crap our of bad pavement and small potholes. It will be a dream on course. The Hayes discs are awesome so far...much quieter than Avid's BB7's. Shifting is all solid Shimano components. The only "upgrade" I made was to put on some Lizard Skin DSP tape to suck some of the vibe out of the aluminum bars. Not sure if I feel safe upgrading them to carbon, but I think it would make it even more plush. The wheels ARE NOT Reynolds Solitude as listed. They are Velocity A23's, but not sure of the build level. They seem bomber so far, and the rear hub is very loud. Not a concern for me, in fact, free-wheeling is almost as good as a bell for getting oblivious dog walkers to MTF Over. I can't wait to cover it in mud, blood, sweat and beer!